What might staff ask to validate an ID from a patron?

Staff often ask for a sample signature or knowledge of the patron's address as a means of validating an ID because these methods provide additional measures to confirm identity beyond just looking at the ID itself. When asking for a signature, staff can compare it to what is present on the ID, ensuring that it matches. This helps verify that the person holding the ID is indeed the rightful owner. Inquiring about the patron's address is another way to check consistency; if a patron's ID claims they reside at a certain address, knowing that address accurately can further strengthen the validity of the identification.

The other options are not standard practices for ID validation. Requesting a blood sample would be intrusive and impractical in most service settings. Asking for social media account details is not a reliable form of identification, as this information can be easily fabricated or shared by another individual. Similarly, inquiring about a favorite drink does not serve to confirm identity and could lead to subjective responses that do not verify ownership of the ID.